What did french do in the american revolution war?

The second agreement, the Treaty of Alliance, made the fledgling United States and France allies against Great Britain in the Revolutionary War. The French decided to back the U.S. in its military efforts until the U.S. had full independence from Great Britain.

united states reinforcements contributed greatly to three allied victories in france at: cantigny (first major american battle), argonne (the largest in the united states military history, involving 1.2 million american soldiers), and château-thierry (one of the first actions under general pershing).